Setup your mac to use Spotify as your alarm clock

alarm_clock_spotify.scpt

# In order to use this script, you must replace 'YOURUSERNAMEHERE' with your Spotify username.
# Execute this script like so: 'osascript alarm_clock_spotify.scpt' (without single-quotes obviously)
# Full explanation here: http://www.nikhilgopal.com/2011/08/show-and-tell-applescript-spotify-alarm.html
# If you would like to specify a playlist, please refer to this gist: https://gist.github.com/3344118

set volume 2
open location "spotify:user:YOURUSERNAMEHERE:playlist:muzic"
tell application "Spotify"
	set the sound volume to 0
	play
	repeat 10 times
		if sound volume is less than 80 then
			set sound volume to (sound volume + 10)
			delay 3
		end if
	end repeat
end tell

First, big kudos for the explanation!
I try setting it up right now, but on your website (https://nikhilgopal.com/2011/08/03/show-and-tell-applescript-a-spotify-alarm-clock-on-mac/) I cannot see the pic with the code for the VI editor. Could you post the code line here?

Open a terminal window and type EDITOR=nano crontab -e to enter cron editor.
Then add this line of code 55 6 * * * osascript /path-to-file/alarm_clock_spotify.scpt Click ctrl+x to exit, then click y to save. It should run automatically at this time now
The numbers 55 refer to the minute it will run, and the number 6 refers to the hour it will be run. Change these however you would like.

If you want to learn more about cron and how to set the time, there is a good guide here